Dryshake Specifications

PART 1 - GENERAL

1.01 Summary

A. Section Includes: Furnishing of all labor, materials, services and equipment
necessary for the supply and installation of cementitious crystalline waterproofing
(dry shake) to horizontal concrete surfaces as indicated on drawings and as specified herein.

1.03 System Description

A. Cementitious Crystalline Waterproofing (Dry Shake): Concrete waterproofing and protection system shall be of the crystalline type that is a blend of Portland cement, specially graded aggregate and active proprietary chemicals. When applied as a dry shake onto and floated into a fresh slab, the active chemicals diffuse into the concrete and cause a catalytic reaction which generates a non-soluble crystalline structure within the pores and capillary tracts of concrete. This crystalline system causes the concrete to become sealed against the penetration of liquids and protects the concrete from deterioration due to harsh environmental conditions. The system is used for above or below-grade slabs, including liquid retaining structures and where enhanced chemical resistance is required. For areas where increased abrasion resistance is required, utilize Xypex DS-2 which is formulated with a proprietary aggregate hardener.

1.04 System Performance Requirements

A. Testing Requirements: Crystalline waterproofing system shall have been tested in accordance with the following standards and conditions, and the testing results shall meet or exceed the performance requirements as specified herein.

B. Independent Laboratory: Testing shall have been performed by an accredited independent laboratory meeting the requirements of ASTM E 329 or other applicable international standard for certification of testing laboratories. Testing laboratory shall have obtained all control and treated concrete samples.

C. Crystalline Penetration: Crystallizing capability of waterproofing material shall be evidenced by independent SEM (Scanning Electron Microscope) photographs. Crystal growth 12 inches (30 cm) from the surface of the coating shall be evident with 1000X magnification 1 year after application of the coating and exposure of the sample to normal weathering.

D. Permeability: Independent testing shall be performed according to U.S. Army Corps of Engineers CRD C48 “Permeability of Concrete”. Concrete samples shall have design strength of 2000 psi (14 MPa) and thickness of 2 inches (50 mm). Treated samples shall have two coats of crystalline waterproofing applied per manufacturer’s directions. Samples to be pressure tested to 175 psi (405 foot head of water) or 1.2 MPa (123.4 m head of water). Control samples shall leak and treated samples, after crystalline growth has occurred, shall exhibit no measurable leakage.

E. Permeability - Negative Side Application: Independent testing shall be performed according to EN 12390–8 or other recognized direct pressure test. Concrete samples shall have a design strength of 25 MPa (3600 psi). Treated samples shall be exposed to water pressure on the side opposite to the crystalline coating. Coated samples shall exhibit a greater than 90% reduction in depth of water penetration as compared to the control samples.

H. Carbonation Resistance Testing: Independent testing shall be performed according to RILEM CPC-18 or other recognized accelerated carbonation test. Concrete samples shall have a 0.5 w/cm ratio or be approximately 30 MPa (4500 psi) in strength. Coated samples shall have crystalline coating applied one day after casting and all samples to be cured for 7 days prior to carbonation. After 91 days exposure to CO2 the coated samples shall show a 35% or greater reduction in carbonation depth as compared to the control samples.

1.05 Submittals

A. General: Submit listed submittals in accordance with conditions of the Contract
and with Division 1 Submittal Procedures Section.

D. Manufacturer’s Certification: Provide document signed by manufacturer or manufacturer’s representative certifying that the materials to be installed comply with the requirements of this specification.

1.06 Quality Assurance

A. Manufacturer Qualifications: Manufacturer shall be ISO 9001 registered, and shall have no less than 10 years experience in manufacturing the cementitious crystalline waterproofing materials for the required work. Manufacturer must be capable of providing field service representation during construction phase. Manufacturers who cannot provide ongoing field support or the performance test data specified herein will not be considered for the project.

B. Applicator: Waterproofing applicator shall be experienced in the installation of
dry shake cementitious materials as demonstrated by previous successful installations,
and shall be approved by the manufacturer in writing.

1.08 Project Conditions

A. Compliance: Comply with manufacturer’s product data regarding condition of substrate to receive waterproofing, weather conditions before and during installation, and protection of the installed waterproofing system.

1.09 Warranty

A. Project Warranty: Refer to conditions of the Contract for project warranty provisions.